What is inertial navigation system (INS) ?

INS (Inertial Navigation
System) is an autonomous navigation system that uses inertial sensitive
devices, reference directions, and initial position information to determine
the position, direction, and speed of moving objects in inertial space.

Inertial Navigation System (INS) VS Embedded GPS Inertial Navigation System (EGI)

The embedded configuration
does not require an additional safety bus between the inertial navigation and a
separate GPS receiver, so that the GPS pseudo-range and pseudo-range rate data
will not be interfered with by threat signals. This deep coupling system of INS
and GPS is called “embedded GPS inertial navigation system”, referred
to as EGI for short.

Inertial Navigation System VS GPS

The INS is a
system that measures the position of the objects. It is based on the interaction
between accelerometer and gyroscope to obtain the reference coordinate system,
and then to conduct positioning. INS is a completely autonomous navigation
system that does not send/receive signals to/from the outside, and can
accurately locate the position of the objects.

Features:

High
accuracy;

It can
measure the target position of the high mobility objects without external
interference.

GPS
positioning is a navigation system that uses satellites to perform real-time
positioning on a global scale. It mainly collects and locates information
through satellite ephemeris, relative distance, atmospheric correction and
other data, so as to calculate the accurate position.

Features:

Ability to
work globally and around the clock;

Multiple
functions and wide application;

High efficiency
and simple operation.

How
accurate is inertial navigation?

GPS uses P
code reception, and the positioning accuracy can reach about 10m. The accuracy
of INS can reach the centimeter level. Applied signal processing algorithms and
combined with GPS/INS, it will be able to make up for the shortcomings of
insufficient accuracy of the most hardware.

INS and GPS integration

INS / GPS integrated navigation system refers to the integrated
navigation system based on GPS satellite navigation system and inertial
navigation system. It makes full use of the advantages of both navigation
systems, based on the optimal estimation calculation-Kalman filter algorithm
fuse the two navigation algorithms to obtain the optimal navigation results;
especially when the satellite navigation system has no signals, the inertial
navigation system could work, ensuring the normal operation of the navigation
system, and improving the stability and reliability.

GPS / INS combination – enhances the
anti-interference ability of the system

When the GPS signal reception has
severely interfered or the receiver has a problem, the INS system will
independently complete the positioning and navigation work. In other words,
when the navigation equipment you use is in a weak place such as a tunnel, you
can continue to complete positioning navigation through the INS system without
interruption. When the GPS signal is received normally, the INS will provide
the GPS receiver with position, speed and other information, which is
convenient for the navigation device to re-acquire the carrier and GPS code.

GPS / INS combination- improves system
accuracy

The accuracy of GPS is high, so this
high-precision information can be used to correct the INS and reduce the
accumulation of errors over time. On the other hand, INS is prior to high
positioning accuracy and high data sampling rate in a short time, which can
provide auxiliary information for GPS. This greatly improves the ability of the
system to recapture satellite signals.

GPS/INS is a system in which GPS and INS
complement each other. It is not a simple combination. The integrated system
has better positioning and navigation performance as well as a wider
application range.

INS
GPS tracker

When we drive in the city, we often pass high-rise buildings,
underground tunnels, and viaduct. The barriers of the buildings
will affect the GPS signal reception and form the so-called “urban
canyon.” JM-VG01U GPS and INS
tracker provide precise navigation in areas with limited satellite
coverage. The device also incorporates GPS for car navigation. This means that
even in areas where GPS signals are weak or even lost, the driver will not get
lost.

JM-VG01U is a
tracker with advanced adaptive integrated navigation algorithm and GNSS
positioning, which can provide real-time high-precision vehicle positioning in
any environment (such as tunnels, underground garages, etc.), speed and
attitude information. When the signal of the GNSS system is poor or even
lost,  JM-VG01U can use inertial
navigation technology to independently perform high-precision positioning,
speed and attitude measurement on the vehicle. With a built-in
multi-positioning module, JM-VG01U supports the simultaneous reception of GPS,
GLONASS, Galileo and Beidou. Compared with a single GPS system, the JM-VG01U
greatly increases the number of visible and available satellites, while reduces
the first positioning time. In addition, even driving in complex urban
environments can achieve higher positioning accuracy.

Each positioning technology has its own characteristics, while the
application range of inertial navigation will be wider, and the cost will be
relatively lower. For the characteristics of inertial navigation that will
generate cumulative errors, we can adopt a multi-source data fusion and
multi-dimensional intelligent learning scheme to obtain all identifiable
signals for correcting the inertial navigation offset, and automatically
correct the deviation through map data. For a long period of time in the future,
inertial navigation positioning will be the core technology in positioning
solutions. If you want to know more about JM-VG01U inertial navigation system GPS tracker, please contacts us.